Tang, Jialing, Xingin Chen, and Chuanchom Sakondhavat. 1989. “Pulmonary Metastases in Gestational Trophoblastic Disease A Review of 223 Cases”. Thai Journal of Obstetrics and Gynaecology 1 (2). Bangkok, Thailand:97-100. https://he02.tci-thaijo.org/index.php/tjog/article/view/257903.